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2005 Carolina Skiff 16DLX won't plane..

Old 11-21-2014, 08:31 AM
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Default 2005 Carolina Skiff 16DLX won't plane..

The boat is my neighbors. It is a Carolina Skiff 16DLX. No console. Uses a tiller motor.

It is powered with a Tohatsu 30 four stroke. The prop is a 9.9X11.

There is a doel-fin on the cavitation plate. That cavitation plate looks to be 2" at least below the bottom of the boat.

The motor will never get over 4500 rpms. I have a feeling it is overpropped.

I have also read where these hulls can hold water due to the screws not being sealed...

Anyone have any idea what would be the right prop for this rig? Or any idea what the motor height should be. Or if they do in fact leak?

Thanks!

Last edited by triumphrick; 11-22-2014 at 07:04 PM.
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Old 11-21-2014, 12:05 PM
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Originally Posted by triumphrick View Post
The boat is my neighbors. It is a Carolina Skiff 16DLX. No console. Uses a tiller motor.

It is powered with a Tohatsu 30 four stroke. The prop is a 9.9X11.

There is a doel-fin on the cavitation plate. That cavitation plate looks to be 2" at least below the bottom of the boat.

The motor will never get over 4500 rpms. I have a feeling it is overpropped.

I have also read where these hulls can hold water due to the screws not being sealed...

Anyone have any idea what would be the right prop for this rig? Or any idea what the motor height should be. Or if they do in fact leak?

Thanks!

Cavitation plate should be at least even with the bottom of the boat. that will make a big difference on prop pitch. Not sure about what pitch though.
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Old 11-22-2014, 07:13 AM
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Thanks...my thoughts as well...

Not too hard to raise this motor as there is room to do so, probably next step..
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Old 11-22-2014, 07:21 AM
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Also try calling Ken at "Prop Gods". He is very helpful with any questions or suggestions
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Old 11-22-2014, 07:38 PM
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Those hulls definitely hold water. Ask Coores14 about it.

We had a J16 as kids and with a 25hp Evinrude....got around pretty good.
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Old 11-25-2014, 08:33 AM
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If you think there's water in it drill a hole in your transom. It's the only way to find out. Fill it up with some epoxy afterwards.
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Old 12-06-2014, 05:22 AM
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An easy test is you should be able to pick up the back of the boat without too much effort if you haven't experienced water intrusion. I couldn't begin to lift a 14CS that was full of water.
Here's a link to the restoration on my J16. You should join the CS owners forum if you haven't already.

http://www.carolinaskiffowner.com/sh...p-introduction
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Old 01-09-2015, 07:56 PM
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I had a similar problem. Went to a 9x9 prop and that skiff made 25 kt's with a 30 year old 25 Johnson. I'd check for water first tho.
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Old 01-11-2015, 01:38 PM
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definitely check for water.

I would expect that boat should run mid to high 20's

The gear ratio that I'm seeing on that motor is 1.92 RPM range 5250-6250
If we guessed an average 10% slip, at 6000 RPM you'd be running 28MPH with that 11 pitch prop.

A lower pitch would most likely help you in the current setup, but before you mess with props, I'd raise the motor a little, and make sure your getting full throttle throw on the linkage, and weigh that hull somehow.
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Old 02-02-2015, 04:50 PM
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Originally Posted by potty dock View Post
Cavitation plate should be at least even with the bottom of the boat. that will make a big difference on prop pitch. Not sure about what pitch though.
Carolina Skiff recommends that the cavitation plate (or anti-cavitation plate ) be 3/4" to 1" below the bottom of the boat.
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Old 02-02-2015, 05:12 PM
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UPDATE!

Moved the motor up as far as I could...about 2"..

Hopped in, put momma on the bow seat and off we went..

Ran like a completely different boat. Got up and on plane pretty quickly and held a good cruise...as well as ran up to 5800 rpm.

I did remove the transducer screws just to check for water and there was none...
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Old 02-02-2015, 06:36 PM
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Originally Posted by MIKE F View Post
Carolina Skiff recommends that the cavitation plate (or anti-cavitation plate ) be 3/4" to 1" below the bottom of the boat.
Anti-ventilation
Cavitation is hydrogen bubbles on the low-pressure side propeller, The anti-ventilation plate helps reduce the amount of air that gets pulled down from the surface during acceleration
Gerald
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Old 02-03-2015, 05:57 AM
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thanks for the follow up !!
glad raising the motor worked out well.
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Old 02-03-2015, 08:39 AM
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Originally Posted by triumphrick View Post
UPDATE!

Moved the motor up as far as I could...about 2"..

Hopped in, put momma on the bow seat and off we went..

Ran like a completely different boat. Got up and on plane pretty quickly and held a good cruise...as well as ran up to 5800 rpm.

I did remove the transducer screws just to check for water and there was none...
The water in a Carolina skiff is in the hull forward of the transom. Removing the transducer screws won't drain this water unless the screws extend all the way through the transom.
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